Puh thats a hard Question! There are so much beautiful Games out there. I will tell you the best Games for me, one for each Genre i Play
MMO: Guild Wars 2
I play this Game since Release and over the Years i became a Partner of the Publisher. I think the Community of this Game is one of the Best Communitys in the World. The Game gives you so much to do and so much fun for so less Money. I can't await to play the new Expansion in late Septmeber 2017!
Shooter: Ghost Recon: Wildlands
I love the beautiful Landscape there and the tactical Part. You allways have a few ways to end up the Mission. The Story is also really cool and you can spend Much time to this Game. After a few Patches the most of the Bugs are now away and it's much fun to hunt for Drugdealers.
Action: Overwatch
I think Overwatch is the best game at the Moment. They put in new Stuff all Month and the Matches are Funny and also Balanced to. I think it is the best mixture of fun and competition and a must have game!
Strategy: Star Craft 2
Star Craft two is the best balanced Strategy Game i Know. All units have a counterunit and the maps are really fair. The Singleplayer has a brilliant Storytelling and is really long. I made more than 100 Videos to show the whole Campaigns of all three Parts.
City-Sim: Cities Skylines
This game is how i wished Sim-City. Everything is simulated and with the Steam Workshop you can tune each part of the Game to even mor realism. Great Game!
Fun: Hearthstone
Yeah i know its "only" a Cardgame BUT it makes so much fun. The Animations are really cool and each Battleground is interactive. You have so much possibilities to make your Deck. The best thing is it's totally free! Sure you can bought Cardpacks but if you do everyday your Daily you don't need it.
So i hope you enjoyed my little Story and now... i have to go to make my Dailys in Heartstone!